public static Dictionary <string, object> AddVF(this Dictionary <string, object> d, string key, object value, ref string vf) { string temp = ""; if (value is DateTime) { var dt = (DateTime)value; temp = Commons.ToTimestamp(dt).ToString(); } else if (value is Decimal) { var dec = (decimal)value; temp = dec.ToString("#0.00"); } else if (value is bool) { temp = (bool)value ? "true" : "false"; } else { temp = value.ToString(); } d[key] = temp; vf += temp; return(d); }